Red has always had a reputation for being raunchy. But why is it that men seem to be more attracted to women wearing red than any other color?

It's been know for a while that men definitely do rate women wearing red as more attractive—that's been proven in the past. In fact, it doesn't matter what the outfit is, either; a red t-shirt boosts sex appeal in the same as a slinky dress does.

To work that out, a team of researchers based at the University of Rochester showed men a photo of a single woman, which was doctored to look, in different cases, like she was wearing either a red or white T-shirt. The participants were then asked to gauge, on a scale of 1 to 9, if she was "interested in sex."

The result? Women wearing red were graded, on average, 1.5 points higher. The researchers suggest that men may be evolutionarily conditioned to associate the color with fertility. That's not entirely surprising—I'm sure you can think of times associating a rosy red glow with sexual success—but it's interesting to learn that it's at the root of male attraction.